Sources

Sources

1.http://inventors.about.com/od/wstartinventions/a/Walkman.htm

2.http://www.pocketcalculatorshow.com/walkman/history.html

3. http://pocketcalculatorshow.com/boombox/

4.http://www.time.com/time/nation/article/0,8599,1907884,00.html

5.http://www.telegraph.co.uk/science/4981964/Top-10-inventions-that-changed-the-world.html

6.http://www.sony.net/SonyInfo/News/Press_Archive/199907/99-059

7. http://www.youtube.com/watch?v=3MTxMlsDmdQ

8. http://www.youtube.com/watch?v=iO8FDPtN_8M

Picture sources

1.http://www.technologyreview.com/files/10984/0507Walkman_x600.jpg

2.http://md-21.ifrance.com/md-21/materiel/enregistreurs_portables/sony/sony_mzr700.jpg

3.http://futuremusic.com/news/images/sony_pcm-d50.jpg

4.http://cn1.kaboodle.com/hi/img/c/0/0/b1/a/AAAADDsL0PEAAAAAALGuSQ.jpg